Rivet receiver



w. F. WRIGHT RIVET RECEIVER Feb. 23, 1943.

Filed May 23, 194

INVENTOR TORNEYS Patented Feb. 23, 1943 RIVET RECEIVER William F. Wright, New Orleans, La., assignor to Pennsylvania Flexible Metallic Tubing 00., Inc., Philadelphia, Pa., a corporation of Pennsylvania Application May .23, 1941, Serial No. 394,942

Claims.

My invention relates to rivet conveyors, particularly of the pneumatic type wherein the rivets are shot through a conveying tube, and has among its objects and advantages the provision of an improved receiver for connection with the rivet discharging end of the conveying tube.

An object of my invention is to provide a rivet receiver for connection with a rivet conveying tube, in which the receiver is provided with a resilient bumper arranged in the path of the rivets forcibly discharged into the receiver, and in which the receiver is so constructed .as to equalize impact forces transmitted to thereceiver to prevent damagethereto.

In the accompanying drawing:

Figure 1 is a longitudinal sectional view of the receiver;

Figure 2 is a sectional view taken along the line 22 of Figure 1;

Figure 3 is a sectional view taken along the line 3-3 of Figure 1; and

Figure 4 is a side elevational view.

In the embodiment selected for illustration. the receiver comprises a connecting collar 20 having a threaded bore I2 for connection with one end of a rivet receiving tube I 4. This end of the tube l4 abuts a flange IS in the collar H3. The collar I0 is provided with a threaded bore l8 for reception of a tube nut 20 which embraces one end of a corrugated metallic conveyor tube 22 to connect the tube with the collar.

The opposite end of the tube I4 is threaded at 24 for connection with a cap 26 which constitutes a mount for a rivet bumper 28. Open ings 30 are provided in the tube M for the exit of compressed air flowing through the tube 22 for carrying the rivet to the receiver. A large opening 32 is provided in the tube M as an outlet for the rivets discharged into the receiver. Normally this opening is closed by a door 34, this door having its ends slidably positioned in grooves 36 in the collar l0 and the cap 26. The door 34 has a curvature conforming to the curvature of the tube l4 and may be moved circumferentially thereabout for uncovering the opening 32.

Figure 2 illustrates the tube M as being provided with two stops 38 and 40 for determining the fully closed and opened positions, respectively, of the door 34 with respect to the opening 32. Figure 2 illustrates the door 34 in its closed position, at which time the door has engagement with the stop 38. Clockwise rotation of the door 34 brings its opposite edge into engagement with the stop 4!], at which time the opening 32 is fully uncovered to facilitate removal of the rivet in the receiver. A handle 12 is secured to the door 34 to facilitate adjustment thereof. l a

The bumper 28 comprises a cup-like member provided with a flange 44 normally engagingthe flange 48 on the cap 26, this flange also being engaged by the end of the tube It. Between the wall 48 of the cap 26 and the bottom wall 5!! of the rivet bumper is interposed a cushioning spring 52 for the rivet bumper 28. Flanges 54 are provided on the respective walls 48 and 53 to support the spring against lateral displace-- ment. Suflicient space is provided between the flange 46 and the wall 48 for accommodating the necessary axial movement of the rivetbumper 28 in its reaction to rivets forcibly discharged into the receiver.

Both the collar Hi and the cap 26-are' secured to the tube M by means of set screws 56. Two circumferential grooves 58 are cut in the outer face of the tube M, which grooves are located closely adjacent the threaded ends of the tube. Considerable difliculty has been experienced in handling hot rivets because of receiver breakage. Cold rivets may be handled in almost any sort of receiver sufiiciently strong to stand up under the impact of the cold rivets shot into the receiver. However, when hot rivets are being handled the action is entirely different, especially when the heated rivets are permitted to remain in the receiver for any length of time. It appears that the temperature of the hot rivets has the action of placing an unequal strain on the tube which results in objectionable breakage of the tube. The fracture appears after the riveter has allowed the rivet to remain in the tube in a heated state sufficiently long to permit cooling. When another rivet is shot into the receiver the tube tends to fracture at the base of the threads. More satisfactory results have been attained with tubes of lighter material, but such tubes tend todent and obstruct free action of the door. I have found that the grooves 58 provide a construction. which equalize the strain at these points and prevent fracture of the tube.

Without further elaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. A receiver for hot rivets shot from a hose comprising a collar adapted for connection with the hose, a cap, a rivet receiving tube having connection at one end with said collar and connection at its other end with said cap, said tube being provided with a rivet outlet opening intermediate its ends, and said tube being provided with circumferential grooves located between said outlet opening and the respective threaded connections of the tube with said collar and said cap for equalizing tube strain incident to rivet temperatures and the impact of rivets shot into the receiver.

2. A receiver for hot rivets shot from a hose comprising a collar adapted for connection with the hose, a cap, a rivet receiving tube having connection at one end with said collar and connection at its other end with said cap, said tube being provided with a rivet outlet opening intermediate its ends, said tube being provided with circumferential grooves located between said outlet opening and the respective threaded connections of the tube with said collar and said cap for equalizing tube strain incident to rivet temperatures and the impact of rivets shot into the receiver, and a spring pressed rivet bumper housed in said cap.

3. A receiver for hot rivets shot from a hose comprising a collar adapted for connection with the hose, a cap, a tube having threaded connection at one end with said collar and a threaded connection at its other end with said cap, said tube being provided with air exhausting openings and a rivet outlet opening intermediate its ends, a door normally closing said outlet opening, formations on said collar and said cap for guiding said door, and said tube being provided with circumferential grooves located between said outlet opening and the respective threaded connections of the tube with said collar and said cap for equalizing tube strain incident to rivet temperatures and the impact of rivets shot into the receiver.

4. A receiver for hot rivets shot from a hose comprising a collar adapted for connection with the hose, a cap, a tube having threaded connection at one end with said collar and a threaded connection at its other end with said cap, said tube being provided with air exhausting openings and a rivet outlet opening intermediate its ends, a door normally closing said outlet opening, formations on said collar and said cap for guiding said door, said tube being provided with circumferential grooves located between said outlet opening and the respective threaded connections of the tube with said collar and said cap for equalizing tube strain incident to rivet temperatures and the impact of rivets shot into the receiver, and a spring pressed rivet bumper located axially of said tube inside said cap.

5. A receiver for hot rivets shot from a hose comprising a collar adapted for connection with the hose, a cap, a tube having a threaded and set screw connection at one end with said collar and a threaded and set screw connection at its other end with said cap, said tube being provided with air exhausting openings and a rivet outlet opening, a curved door guided by said collar and said cap for normally closing said outlet opening, said tube being provided with circumferential grooves located between said outlet opening and the respective threaded and set screw connections of said tube with said collar and said cap for equalizing tube strain incident to rivet temperatures and the impact of rivets shot into the receiver, and a resilient rivet bumper housed in said cap.

WILLIAM F. WRIGHT- 

